Oil storage exhaust gas sealed recovering process by using self-produced surplus hydrogen

Abstract

The invention relates to an oil storage exhaust gas sealed recovering process by using self-produced surplus hydrogen. An oil storage exhaust gas sealed recovering device comprises a gas storing and releasing buffering tank, an induced fan, a hydrogen buffering tank, a pressure adjustment valve, a pressure relief valve, a self-support hydrogen adjustment valve, a self-support nitrogen adjustment valve, a first safety valve, a second safety valve, a first valve, a second valve, a pressure recording control instrument PRC01 and a pressure recording control instrument PRC02. The oil storage exhaust gas sealed recovering device has the beneficial effects that the surplus hydrogen produced by a PSA variable-pressure adsorption hydrogen producing unit is used as the sealed gas source of the oilstorage gas releasing system, the released gas is recovered and conveyed to a raw material coal gas pipeline of the PSA variable-pressure adsorption hydrogen producing unit under the controllable state, the problem of the direct drainage of the released gas of an oil storage can be solved, the environmental pollution is reduced, the cost is low, and the energy conservation and environmental protection are achieved.

Description

Technical field [0001] The invention relates to the technical field of metallurgical coking, in particular to a process for sealing and recovering tail gas from an oil depot using self-produced surplus hydrogen. Background technique [0002] In the metallurgical coking industry, benzene hydrogenation unit includes PSA pressure swing adsorption hydrogen production unit, main unit (including pretreatment unit, hydrogenation unit, extractive distillation unit, xylene distillation unit), oil depot unit (including raw material storage tank, product storage tank) Etc.), car loading dock. Among them, the intermediate tank of the main device uses nitrogen as the sealing gas and introduces the vented gas into the negative pressure gas system through the venting tank; the car loading and unloading platform, due to the particularity of the loading and unloading vehicles, currently mostly adopts the absorption method, because the washing oil is relatively benzene The absorption effect of si...

AI Technical Summary

Problems solved by technology

However, this solution will lead to an increase in the exhaust gas exhaust volume of the entire device. During the peak period of the exhaust gas, it is very likely to affect the quality of the gas in the gas suction pipeline and the stability of the gas purification system operation.

Images